Method for evaluating powered high-lift effects of externally blown flap

被引：0
|
作者：
Zhang S. [1 ]
Wang W. [1 ]
机构：
[1] The First Aircraft Institute of AVIC, Xi'an
来源：
Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2017年 / 38卷 / 06期
关键词：
Aerodynamics computation; Externally blown flap; Flap configuration optimization; Performance earning evaluation; Powered high-lift;
D O I：
10.7527/S1000-6893.2016.0272
中图分类号：
学科分类号：
摘要：
Externally blown flaps are usually adopted to shorten the takeoff and land distance of transport aircrafts, and the method for evaluating the powered high-lift effect of the externally blown flap is one of the most important techniques in the design of transport aircrafts. A method for rapidly evaluating the powered high-lift effect of the externally blown flap is developed by coupling basic aerodynamics with the velocity correction technique. The proposed method takes into consideration the requirements for aerodynamic data in the performance computation of powered high-lift aircrafts, and can overcome disadvantages of classical trust coefficient method, such as low speed, limits of large thrust coefficient computation, low precision in solving unstick speed, and inefficiency of solving the problem of aerodynamic loading at multi-velocity point. The aerodynamic and takeoff performance of a transport aircraft are analyzed and the powered high-lift effects of the externally blown flaps are evaluated to validate the proposed method. The results show that the takeoff running distance can be shortened by 25% by deflecting the flaps rationally. However, with too large deflection angle of powered high-lift flaps, the aircraft drag will increase dramatically to go against shortening the takeoff running distance. The research results would provide some guidance for the design of externally blown flaps. © 2017, Press of Chinese Journal of Aeronautics. All right reserved.
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  • [1] Parlett L.P., Shivers J.P., Wind-tunnel Investigation of a Large Jet Transport Model Equipped with an External-flow Jet Flap, (1968)
  • [2] Parlett L.P., Shivers J.P., Wind-tunnel Investigation of an STOL Aircraft Configuration Equipped with an External-flow Jet Flap, (1969)
  • [3] Parlett L.P., Freeman D.C., Wind-tunnel Investigation of a Jet Transport Airplane Configuration with High Thrust-weight Ratio and an External-flow Jet Flap, (1970)
  • [4] Aoyagi K., Falarski M.D., Koenig D.G., Wind-tunnel Investigation of a Large Scale 25 deg Swept-wing Jet Transport Model with an External Blowing Tripple-Slotted Flap, (1973)
  • [5] Barberie F.J., Wick A.T., Hooker J.R., Low Speed Powered Lift Testing of a Transonic Cruise Efficient STOL Military Transport, (2013)
  • [6] Wick A.T., Hooker J.R., Barberie F.J., Powered Lift CFD Predictions of a Transonic Cruising STOL Military Transport, (2013)
  • [7] Marcos J., Marshall D.D., Computational and Experimental Comparison of a Powered Lift, Upper Surface Blowing Configuration, (2010)
  • [8] Englar R.J., Campbell B.A., Pneumatic Channel Wing Power-lift Advanced Super-STOL Aircraft, (2002)
  • [9] Bai J.Q., Zhang X.L., Liu N., The research of aerodynamic characteristics of high-lift configuration of large transport plane with the effect of engine jet, Acta Aerodynamica Sinica, 32, 4, pp. 2-5, (2014)
  • [10] Guo S.J., Wang H.J., Li J., Numerical simulating method for powered high-lift flow, Advances in Aeronautical Science and Engineering, 1, 1, pp. 3-5, (2010)
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